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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제117회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Co3O4 nanoparticle intercalated by lithium ions as water oxidation catalyst

2016년 2월 18일 15시 13분 33초
ENVR.P-504 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 22일 (금요일) 13:00~14:30
저자 및
김상준, 박정효, 박동규1, 강정구*
한국과학기술원(KAIST) 신소재공학과, Korea
1한국과학기술원(KAIST) EEWS, Korea
The artificial photosynthesis means conversion of solar energy to chemical energy such as hydrogen, methanol and so on. Recent increasing interests in alternative energy, have caused by the global warming, make artificial photosynthesis more attractive. Water splitting, one part of artificial photosynthesis, is the simplest way to make hydrogen and is promising for energy applications. Instead of overall water splitting owing to its technical limitation, it is separately investigated by water oxidation and water reduction. Water oxidation is more difficult between them because it needs 4 electrons in one reaction. Cobalt oxide (Co3O4) is promising water oxidation catalyst in [Ru(bpy)3]2+-Na2S2O8 system. This system consist of ruthenium photosensitizer and persulfate sacrificial agent. There were various methods to increase water oxidation ability using cobalt oxide including porous cobalt oxide, cobalt oxide nanotube, doping, Lithium ion intercalation is efficient method making metal oxide nanoparticle. Cobalt oxide nanoparticle intercalated by lithium ion was tested as water oxidation catalyst in [Ru(bpy)3]2+-Na2S2O8 system. High resolution transmission electron microscopy and Scanning electron microscopy showed that cobalt oxide nanoparticle has sub-nano size. X-ray photoelectron spectroscopy and near edge X-ray absorption fine structure reveal its oxidation state and bonding nature of oxide particle. Photocatalytic test including photoluminescence and time-correlated single-photon counting test showed that cobalt oxide intercalated by lithium ion is efficient water oxidation catalyst.